Lock.



J. E. NISBET.

LOCK.

APPLICATION man 050.1. |914.

1,176,594. Patented Mar. 21, 1916.

THE cDLUMBlA PLArjuaRAPI-l C0., wASHlNGTNB. C`

JAMES E. NISBET, OF JACKSONVILLE, ALABAMA.

LOCK.

Specification of Letters Patent.

Fatented Mar. 21, 1916.

Application led December 7, 1914. Serial No. 875,912.

To all whom, t may concern Be it known that I, JAMES E. Nrscnr, a citizen of the United States, residing at Jacksonville, in the county of Calhoun and State of Alabama, have invented certain new and useful improvements in Locks; and l do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to new and useful improvements in locks, and the object of the invention is to provide a lock having a sliding latch bar adapted to be operated by a knob, and a novel type of locking means for the latch bar by means of which the latch bar can be locked against movement when in an operative position, the said locking means being capable of being operated at a point distant from the door.

Other objects will appear and be better understood from that embodiment of my invention of which the following is a specification, reference being had to the accompanying drawing forming a part thereof, in which Figure 1 is a perspecive view of a door showing this impro-ved lock applied there-to, Fig. 2 is a vertical sectional view of a lock constructed in accordance with this invention, Fig. 3 is a sectional view taken on line 3 3 of Fig. 2, Fig. l is an enlarged detail fragmentaryT view in elevation of the interior of the lock showing the same in its locked position, and Fig. is a view similar to Fig. e showing the device in its unlocked position.

Referring now to the drawings by characters of reference, the numeral 1 designates the building of the ordinary construction which is provided with the usual door frame 2 in which the door 3 is hinged. This building is provided with a porch 11 which is covered by the roof 5 and the door carries a suitable lock designated generally by the numeral 6. This lock G comprises the casing 7 in which the usual latch 8 is slidable. This latch is controlled by a latch-operating lever 9 which in turn is operated from the shaft 10, on which the knob 11 is secured,

and the latch as lin ordinary cases is provided with the button-locking mechanism 12 as is clearly shown in Fig. 2.

My improved lock, which is designated generally by the numeral 13, comprises the rectangular body 111- which is cast on the interior of the casing and provided with an internally screw threaded recess 15 in which the screw 16 extends. This screw 16 projects through the aperture 17 formed in the arcuate spring plate 18, which plate is designed to bear against the locking member 19 which is provided with the elongated, rectangular aperture 20, which aperture is of .1;

. and 23 are of suliicient length to admit of the door being fully opened, and also to admit of the free ends of the cords being positioned at points distant from the door.

From the foregoing it will be apparent that when it is desired to lock the door, the same is closed in the usual manner which will cause the latch to press backwardly against the action of the usual spring and after the door has been closed the flexible connection 22 is pulled, which will cause the locking element 19 to slide upwardly on the boss 1st and in rear and in close proximity to the lever 9, so as to prevent operation of the lever and due to the spring action of the arcuate plate 18, it will be apparent that the locking element will be held against accidental movement. The end of the flexible connection may be carried to any point and hidden in any desired manner around to the side or rear of the building` or any other point desired by the user. Then the unlocking cord 23 is operated the locking member 19 will be withdrawn from behind the lever and returned to normal position, admitting of the operation of the lever by turning` the shaft 10. The unlocking cord 23 may be carried to a point distant from the terminal of the locking cord, and it will thus be evident that the concealing of the locking cord may have nothing to do with the concealing of the unlocking cord, thus rendering the lock exceedingly safe. It is to be understood that the person using this device may hide the terminals of the cords 22 or 23 at any desired point or points .stood that such changes may be made in the combination and arrangement of parts as will fall within the spirit and scope of the invention as defined in the appended claim.

What is claimed is In a lock, the combination with a casing having a sliding latch bar therein and a lever having operative connection with the latch bar, of a lug formed integrally with the inner surface of one wall of the casing and disposed below the latch bar and the lever, a rectangular shaped body located within the casing and having an elongated of the door opening` therein for slidably receiving the lug, a locking cord having one end extending into the casing and connected to one end of' the slidable body and adapted when pulled in one direction to cause the slidable body to move upwardly and in rear of and in close proximity to the lever, so asto prevent operation of therlever, an unlocking cord having one end extending into the casing and having connection with the opposite vend of theslidable body and adapted, when slidable body below operated, to move the plate frictionally the lever, Vand a spring engaging the'outer side of theslidable body Y Y for .holding they body against movement when the latter is moved to operative position, and means for regulating the tric-V tional engagement between the plate and the slidable body. I c Y f In testimony whereof I aiiiX my signature in presence of two witnesses. Y Y JAMES E.V NISBE'I. .Y IVitnesses: Y j

Jol-IN F. BYRNE, BENNETT S. JONES.

Copies of this patent may be obtained for v'e cents eachfby addressing the Commissioner Vo fIPati'mts,

Washington, ID. C. 

